Extech Pitot Tube Anemometer + Differential Manometer, 200 to 15733 FPM

Simultaneous display of Pressure, Air Velocity or Air Flow plus Temperature "0.7252psi range 5 selectable units of pressure measurement Max/Min/Avg recording and Relative time stamp Data Hold and Auto power off functions Large LCD display with backlighting, USB port Zero function for offset correction or measurement Store/Recall up to 99 readings in each mode Specifications Dimensions/Weight 8.2 x 2.9 x 1.9in (210 x 75 x 50mm) / 12oz (340g) Ft/Min 200 to 15733 Knots 2.0 to 154.6 Km/H 3.5 to 288.0/ MPH: 2.25 to 178.66 inH?O 20.07inH?O Linearity/Hysteresis "0.29FS Pitot Tube 15.4 x 7.7in (390 x 195mm): Diameter 0.32in (8mm) / 7.2oz (204g) Temperature 32.0 to 122.0"F (0 to 50"C) Airflow 0 to 99,999 PSI 0.7252psi mmH?O 509.8mmH?O Items Included Includes Windows" compatible software with cable 9V battery pitot tube with two 33.5" (85cm) connection hoses hard carrying case